256613032730120 has 32 divisors (see below), whose sum is σ = 629868353065920. Its totient is φ = 93313830083520.

The previous prime is 256613032730107. The next prime is 256613032730123. The reversal of 256613032730120 is 21037230316652.

It is not an unprimeable number, because it can be changed into a prime (256613032730123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291605718572 + ... + 291605719451.

It is an arithmetic number, because the mean of its divisors is an integer number (19683386033310).

Almost surely, 2^{256613032730120} is an apocalyptic number.

256613032730120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256613032730120 is an abundant number, since it is smaller than the sum of its proper divisors (373255320335800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256613032730120 is a wasteful number, since it uses less digits than its factorization.

256613032730120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583211438045 (or 583211438041 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 256613032730120 in words is "two hundred fifty-six trillion, six hundred thirteen billion, thirty-two million, seven hundred thirty thousand, one hundred twenty".